ALLOYWORKS RED Y-JIONT for Audi A6 S4 2.7T Silicone Throttle Body Boot These hoses are designed for air and water/coolant only. Not suitable for oil. Thickness: 4mm, 3 ply Size tolerance: +/-0.5mm For Audi A6 S4 2.7T Top Attention : The item will be shipped out within 1 business day from Our USA Warehouse(Rowland Heights, San Leandro and Florida)